Community Forums

RustyJC · 08-17-2007, 08:19 AM

<BLOCKQUOTE class="ip-ubbcode-quote"><div class="ip-ubbcode-quote-title">quote:</div><div class="ip-ubbcode-quote-content">Originally posted by DriVer:
I am thinking that comparing the 8.1L engine to a bigger displacement engine is more appropriate in this discussion than comparing downward to a 3.5 L or smaller engine. </div></BLOCKQUOTE>
My response was to a direct question regarding Acuras and was not intended to have any implications whatsoever regarding the 8.1L GM engine.

Rusty

Tom N · 08-17-2007, 09:18 AM

<BLOCKQUOTE class="ip-ubbcode-quote"><div class="ip-ubbcode-quote-title">quote:</div><div class="ip-ubbcode-quote-content">Originally posted by Jestme13:
I'm considering using Amsoil and a bypass filter on my CAT C7, gives me a 25,000 mile change interval.

</div></BLOCKQUOTE>

Do you have any documentation from Cat that you can extended you change interval past what they recommend when using synthetic??

-Tom

DriVer · 08-17-2007, 11:15 AM

<BLOCKQUOTE class="ip-ubbcode-quote"><div class="ip-ubbcode-quote-title">quote:</div><div class="ip-ubbcode-quote-content">Originally posted by Tom N:
Do you have any documentation from Cat that you can extended you change interval past what they recommend when using synthetic?? </div></BLOCKQUOTE>Tom, How about documentation from the manufacturer of the oil backed up by a Blackstone Lab test on a routine basis? Keeping synthetic oil in a diesel for extended drain intervals is a norm and I have read in numerous over the road truck trade pubs that they retain oil for as much as 200,000 miles.

Joe Gilbert · 08-19-2007, 02:12 PM

DriVer, glad you mentioned "Blackstone Lab" as I have used this lab since my W22 was new. It would be interesting to see lab results from those who have this or similar data. I've posted my lab results before (and been flamed by some) but in my case the issue was high silicon (as in dirt) with the stock air intake and stock filter. These numbers dropped like a rock as soon as I added my C.A.I. and S&B filter.

DriVer · 08-19-2007, 04:38 PM

<BLOCKQUOTE class="ip-ubbcode-quote"><div class="ip-ubbcode-quote-title">quote:</div><div class="ip-ubbcode-quote-content">Originally posted by Joe Gilbert:
These numbers dropped like a rock as soon as I added my C.A.I. and S&B filter. </div></BLOCKQUOTE>You certainly won't get flamed from me that for sure. Proactively doing the right thing is always the best course of action regardless of what the prevailing thought of the moment is regarding one issue or another.

A "Blackstone Lab" report is exactly what Workhorse will do "IF" they come across a head scratcher that requires more figurin' than just ripping an engine apart. Having a lab report is not something that is over kill. A properly formulated maintenance strategy employing scientific data is just what fleet operators do all the time. It's the key ingredient that saves them money and makes their business thrive. In the long run it'll save your engine, conserve resources, free up your time for important things like traveling and reduce your dependency on redundant maintenance cycles.

Uncle Sam · 08-22-2007, 03:45 PM

Just a short note about my experience with Mobil I oil. I sold mobile oils for many years and I attended several oil classes put on by mobile Oil co. One of the things they always stressed to us was not to talk a customer into using mobile I if the mileage was over 50000, what would happen was the additive package was so good that it would clean out everything and you would have a leaking engine. I sold it for many years and I never had an engine fail that was using this oil. Another thing I watched a film where they took an engine and put it in a cold room and first started the engine using a regular oil 10w30 and timed how long it would take the oil to reach the upper rocker arm shaft. then they did the same engine using MObile 1 10w30, Depending on the tempature it would sometimes be 5 min. with the regular oil, and the Mobil 1 would be less than a min. The big difference is the molecules in Regular oil is all different sizes and in the Mobil 1 they are all the same size.

DriVer · 08-22-2007, 03:58 PM

<BLOCKQUOTE class="ip-ubbcode-quote"><div class="ip-ubbcode-quote-title">quote:</div><div class="ip-ubbcode-quote-content">Originally posted by Uncle Sam:
The big difference is the molecules in Regular oil is all different sizes and in the Mobil 1 they are all the same size. </div></BLOCKQUOTE>Thank you for sharing that. This is certainly one of the properties that I champion every time I speak about synthetic oils whether its motor oil or transmission fluid.

Pusherman · 08-22-2007, 04:09 PM

<BLOCKQUOTE class="ip-ubbcode-quote"><div class="ip-ubbcode-quote-title">quote:</div><div class="ip-ubbcode-quote-content">Originally posted by Jestme13:
I'm considering using Amsoil and a bypass filter on my CAT C7, gives me a 25,000 mile change interval.

</div></BLOCKQUOTE>

CAT specifically does not recommend extending the oil change intervals with synthetics (I asked @ Perry). So Steve, use synthetics if you like, but I'd stick to the CAT posted change interval of 11K miles or 1X/year.